Family name ตั้น (Tan 
, ตั้น) , all around the world, is a prevalent cognomen. The cognomen ตั้น is habitual in Singapore, where it is a prevalent surname, Malaysia, where it is a widespread surname, and Bermuda (explore the name in all countries). In absolute terms, it is commonest in China, Malaysia, and Singapore. Much less frequently, ตั้น is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tan | Philippines, Singapore, Indonesia, Malaysia, China |